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Siemens 3RT2024-2KB40 — Contactors

Siemens 3RT2024-2KB40 SIRIUS Coupling Contactor, 24 VDC, S0

MPN3RT2024-2KB40
Active

Siemens SIRIUS, coupling contactor, 3RT2024-2KB40, S0 frame, 24 VDC coil, spring-type terminals, 45 mm width, 107 mm depth.

Siemens 3RT2024-2KB40 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RT2024-2KB40 — Identification
ParameterValue
Contactor frame sizeS0
3RT2024-2KB40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V12.5 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V2 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2024-2KB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2024-2KB40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2024-2KB40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 63A (690V,100kA), aM: 32A (690V,100kA), BS88: 63A (415V,80kA)
Short-circuit coordination type 2, fusegG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2024-2KB40 — Connection & Mounting
ParameterValue
Main circuit connectionspring-loaded terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid1 ... 10 mm²
Conductor cross-section, solid or stranded2x (0.5 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2024-2KB40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2024-2KB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2024-2KB40 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth107 mm

Product details

Integrator note — SIRIUS 3RT2024-2KB40 coupling contactor

Rated DC-1 switching at 24 V carries 10 A; at 48 V and 60 V the rating drops to 2 A, and at 220 V to 0.3 A — so for higher-voltage DC loads the contactor is limited to signal-level currents, not power switching. The coil draws an initial inrush of 1.25 A and holds at 0.7 A; arcing time is 10 ms, and the mechanical life is rated at 10 million operations typical.

Spring-type terminals accept solid or stranded conductors from 1 to 10 mm², or 2x (0.5 to 2.5 mm²) for daisy-chaining. Main contacts are sized for 18 to 8 AWG — verify your wire gauge fits the terminal range before terminating.

Clearance and thermal limits

Frequently asked questions

What is the depth of 3RT2024-2KB40?

The depth is 107 mm.

What wire sizes does the spring-type terminal accept?

Solid or stranded conductors from 1 to 10 mm², or 2x (0.5 to 2.5 mm²).

MPN
3RT2024-2KB40